Exam 2: Graphical Descriptive Techniques I

With nominal data, there is one and only one way the possible values can be ordered.

Which of the following statements about pie charts is false?

A cross-classification table is the same thing as two frequency distribution tables, one for each variable.

Your age is an interval variable.

Explain the difference between ordinal data and interval data.

In purchasing an automobile, there are a number of variables to consider.The body style of the car (sedan, coupe, wagon, etc.) is an example of a(n) ____________________ variable.

A relative frequency distribution lists the categories and their counts.

Which situation identifies when to use pie charts and/or bar charts?

Interval data may be treated as ordinal or nominal.

The values of quantitative data are categories.

Provide one example of ordinal data; one example of nominal data; and one example of interval data.

Before leaving a particular restaurant, customers are asked to respond to the questions listed below.For each question, determine whether the possible responses are interval, nominal, or ordinal. a. What is the approximate distance (in miles) between this restaurant and your residence? b. Have you ever eaten at this restaurant before? c. On how many occasions have you eaten at the restaurant before? d. Which of the following attributes of this restaurant do you find most attractive: service, prices, quality of the food, or the menu? e. What is your overall rating of the restaurant: excellent, good, fair, or poor?

Interval data, such as heights, weights, incomes, and distances, are also referred to as quantitative or numerical data.

From a pie chart you are able to find the frequency for each category.

To evaluate two nominal variables at the same time, a(n) ____________________ table should be created from the data.

Business School Graduates A sample of business school graduates were asked what their major was.The results are shown in the following frequency distribution. -{Business School Graduates Narrative} How many graduates were surveyed?

Data that contains information on a single variable is called ____________________ data.

All-Nighters A sample of 400 students at a certain university was taken after the midterm; 200 students reported staying up all night before the midterm and the other 200 students did not.Researchers recorded whether each student did well or poorly on the midterm.The following table contains the results. Did Well on Did Poorly on Midterm Midterm Stayed up all night 60 140 Did not stay up all night 120 80 -{All-Nighters Narrative} Briefly explain (using percentages) whether staying up all night before this midterm is related to a student doing poorly.

The classification of student class designation (freshman, sophomore, junior, senior) is an example of a(n)

All-Nighters A sample of 400 students at a certain university was taken after the midterm; 200 students reported staying up all night before the midterm and the other 200 students did not.Researchers recorded whether each student did well or poorly on the midterm.The following table contains the results. Did Well on Did Poorly on Midterm Midterm Stayed up all night 60 140 Did not stay up all night 120 80 -{All-Nighters Narrative} There is a relationship between whether or not a student stayed up all night before the midterm, and how well they did on the midterm.Describe this relationship using percentages.